Friday Harbor Airport Weather Forecast

    • 49
    • 65

    Increasing Clouds

    • 49
    • 65

    Increasing Clouds

    • 49
    • 67

    Slight Chance Rain

    • 50
    • 68

    Partly Sunny

    • 50
    • 69

    Partly Sunny

    • 51
    • 67

    Partly Sunny

    • 51
    • 70

    Partly Sunny

Today 3 Sep San Juan County

Mostly sunny. A slight chance of Showers in the morning. Highs in the 60s. Southeast wind 10 to 20 Mph.

Tonight 3 Sep San Juan County

Partly cloudy. Lows in the upper 40s to mid 50s. Light wind.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Friday Harbor Airport Temperature Statistics

September Temperature

Friday Harbor Airport (0 miles)

  • Lowest 1 September, 2026

    50 °F

  • Average September

    57.1 °F

  • Highest 1 September, 2026

    64 °F

Climate (2021–2026)

Friday Harbor Airport (0 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    44.5 °F

  • Average 2021–2026

    51.9 °F

  • Average High 2021–2026

    59.7 °F
Get WillyWeather+ to remove ads